Electric door-opening device.



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PATENTED MAY 30,1905.- F.STAEHLE. ELECTRIC DOOR OPENING DEVICE. APPLICATION FILED FEB. 10, 1904.

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F. STAEHLE. ELECTRIC DOOR OPENING DEVICE.

APPLIGATION FILED FEB. 10, 1904.

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UNITED STATES Patented May 30, 1905.

FRANK STAEHLE, OF NEWARK, NEW JERSEY.

EL ECTR IC DOOR-OPENING D EVICE.

SPECIFICATION forming part of Letters Patent No. 791,113, dated May 30, 1905. Application filed February 10, 1904. Serial No. 192,896.

T0 all whmn it ntay concern:

Be it known that I, FRANK STAEHLE, a citizen of the United States, and a resident of the city of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Electrical Door- Opening Devices; and I do declare the following to be a full, clear, and exact-description .of the invention, such as will enable others skilled in the art to whichitappertains to make and use the same, reference being had to the accompanying drawings, forming a part thereof, in which similar letters of reference indicate similar parts throughout.

This invention relates to an improved elec- A trical door-opening device which is designed to be operated from a distant point by an electric circuit, so as to permit the person at the outside of the door to enter.

The object of this invention is to. provide an electrical door-opening device having a compact arrangement, one which shall be durable andefiicient, simple in construction, and comparatively inexpensive; and it consists of a device provided with an electromagnet and its, armature, a toggle-joint pivotally secured to the keeper, and suitableactuating mechanism interposed between the armature and togglejoint whereby the keeper is moved when the magnet is energized.

Figure 1 is a plan view of a door-opening device embodying my invention with the side 1 plates of the inclosing case removed. Figs. 2 and 3 are sectional elevations taken, respec tively, on lines ac and w an in Fig. 1. Fig. 4 is a modified form of my improved device arranged in a cylindrical inclosing case. .Fig. 5 is an end elevation of the same. Fig. 6'is a plan view of another modified form of my improved device. Fig. 7 is a sectional side elevation taken on lines m m in Fig. 6. Figs. 8 and 10 represent additional modified'forms .of my improved device; and Figs. 9 and 11 represent sectional side elevations taken, respectively, on lines a" w and w w in Figs. 8 and 10.

In the drawings, a designates an inclosing case of the ordinary type provided with a -.face or striker plate 6. The electromagnet cv of common form is secured in the case in any the interior of the building.

In Fig. 1, 9 represents a pivoted bell-crank, arranged in any well-known manner and engaging with one end of the pivoted lever it, while the other end of said pivoted lever 71 bears against: the rule-joint f of the togglelinks. The armature d of the magnet is pivoted at d, and some space is between the end of the armature and the end of the pivoted bell-crank so that when the magnet is energized the armature will strike the adjacent end of the bell-crank g a sharp blow, causing the other arm of the bell-crank to raise the end of the pivoted lever it (see Figs. 2 and 3) and lower the other end, which bears against the rule-joint f,thereby breaking said joint and permitting the keeper 2', which is pivotally secured to the inclosing case at j and also pivotally secured to the member f of the toggle-joint, to swing inwardly in the direction of the arrow, so that the door can be pushed slightly and opened by a person from the outside. The purpose of the keeper 6 is to form an abutment for the bolt of the lock on the door,it being understood that the case a is inserted in the door-jamb adjacent to the lock on the door. r designates a spiral spring secured to the case a and wound around the stud of the member 6 of the toggle-links, the free end of which bears against the under side of the member a, causing the toggle-links to return to their normal position after the rulejoint f has been broken.

Devices of this kind are commonly used in connection with speaking-tubes and call-bells at the different floors of the building occupied by different persons, and when a person desires to enter the proper signal is sounded,

calling the person to the speaking-tube, at which .is also located the push-button or circuit-changer bywvhich the mag-net'c .is controlled, so that the person in the building by 5 operating such push-button will admit -the person at the door, who merely has to turn the usual door-knob and openthe door. It is very desirable that the person at the push-button should know when the door has been opened,

and this I accomplish by means ofa-contactspring k, secured in any well-known manner to the contact-screw Z,.wh1ch1s secured to the inclosing case aand properly insulated therefrom. One end of the circuit-wire is-secured 5 to the contact-screw Z and the other end of said1wire .issecured to the contact-screw Z, wh'ieh is-.tap-ped=into.the inc-losing case mat many convenient point. The circuit-Wires are connectedwithamalarm-bell andiany suitable sourceofelectricity. zIt will thus beiseen that vwhen. the magnet 0: is energized and the arma- 'ture .d. strikes: the bell-cranky a hard blow, -causingthe pivoted lever hvto break-the rule- --joint .f. of theetoggle-links, the -member e of 5ithetoggle-links in its downward movement ---will\ contact with the contact-spring is, there- :byclo'sizngtthe circuit and causing the bell-l0- cated in said circuit tobe sounded-and indicating-that the .keeper z'has beenrproperly 13 tripped and that the person outside of the door oanventer.

.iIiliFigkLI haVGShOWH a tubularinclosing casesa iandra single magnet 0, which when -energized=.-will-cause .thearmature d, the con- ;.struetion -of which is such that when said :armature :d is drawn againstthema-gnet the ="rectangulan extension d willbear against the :member '6 of the toggle links, thereby causing the; joint if 'zto be broken and :permitting: the

34 i-keeperw' to swing on. the pivot. j. in' the direcitionindizcated by the arrow.

. IniFigsaGiand 7'1 have shown a modification -whichcon'sists in employingtwo stub-magnets band #a pivoted armature-0Z in combination vwitlrithessametype of toggle-links and keeper -as-1above described. 'In' this modification the armatured is pivotedinlugs 0, extending Ffro-mtthe inside of the inclosingcase a. The underside .ofthearmature d' is provided with L5= an "extension or lug d which inits normal position 'rests on' the rule-joint f of the togfg-le-li-nks: and which is designed to break said jointiwheni the: magnet is energized.

IniFigs. "8': and 9:-I illustnate another modir'fication of :my improved device, which conesists: in employingtan armature d, preferably of rectangular cross-section and pivotedat -.both ends in'athe inclosing case a at p. The -rectangular zprojectiond of said armature rests directly above and on the rnleq'ointf of nthe-aforesaidsdescribed toggle-linksand when the magnet c is energized thesarmature will swing in: the direction indicated by: the :arrow in :Fig. 2.9, thereby causing the rectangular projection d of the armature- (Z to break the rule-joint.

.'A similar modification :is. illustrated in Figs. 10 and 11, in which I employ an armature (l pivoted at one end in the inclosing case at q.

A bell-crank m is conveniently pivoted at on, one end of which is connected, by means of a link a, to the armature (Z, while the other end of said bell crank m bears against the rulewjoint f of. the toggle-links, so that when the magnet c is energized the armature will cause the one end of the pivoted bell -crank in to break the rule o1nt f of the toggle links,

ward, so that the door can be opened.

It will be noticed that I have omitted the contact-spring 7': and the contact-screw land Z from the modifications of. my improved device ShOWD lII FIQS. 4't0'11, inclnsive; bntl wish: it to be understood that in practice all of the diiferentforms are: provided with the said --contact spring and screws; but for brevity .sake and toavoid 'lGpGtltrlOn' of- (lOSCllptlOllI have omitted them in the above-named figures.

It will be understood that the construction and: arrangement and combination of the parts above shown are given onlyto illustrate the practical embodlmcnts of my. invention, and I wish it to be particularly understood that I do not limit :myselfto the precise details of construction hereinbet'ore described, and illustrated in theaccompanying drawings, but I holdmyself at liberty to make such changes and alterations as'fairly fall within the-spirit .andscope of my invention.

Having thus described my invention what I claim is .1. In an electrical door-opening device,--a

keeper, toggle-linkspivotally connected to said keeper,v electromagnetic means for oper- 'ating: said links and keeper and means codperating with one ofthetoggle-hnks designed -.to indlcate at a .d1stance'that:the saidlinks and. keeper have bcenzactuated.

2. In an electrical door opemng'device, a keeper, :toggle -l1nks pivotally connected to said keeper, an electromagnet, an armature for operatingsaid links and keeper, and indicatingmeans cooperating -w1th'one ot'flthe togg-le-links for indicating that: the said links and keeperhave been actuated.

3. In an'electricaldoor-opening dev1ce,:a

keeper, toggle-links pivotally connected to said keeper, an electromagnet, a pivoted bellcrank and an armature foroperating said links and keepeig and indicating means cooperating witlrthetoggle-links for indicating that the said links and keeper have been actuated. 4. In zan-electrical door-opening device, a

keeper, toggle links pivotally connected :to

said keeper, an electromagnet, an armature,

-a :projection on-said armature for openating said links and-keeper, and means cooperating with one of: the toggle-links designed toindithereby permitting the keeper to swing ined to said keeper and to said casing, electrical means for operating said toggle-links to unlock said keeper, and an electrical indicator cooperating with one of the links to produce an indication at a distance that said keeper has been unlocked.

6. In a door-opening device, the combina- 1 tion of a pivoted keeper, a pair of rule-jointed toggle-links connecting said keeper with a rigid abutment, a bell-crank pivotally mounted adjacent to said toggle-links for operating the same, an electromagnet and a pivoted armature therefor, said armature designed when actuated to operate said bell-crank, to break said rulejointed toggle-links, and retract said keeper, and an electrical indicator cooperating with one of said links to produce an indication at a distance that said keeper has been retracted.

7. In a door-opening device the combination of a pivoted keeper, a pair of rule-jointed toggle-links, a spring operating upon said links to maintain the same innormal position with the keeper locked, an electromagnet and an armature therefor, a bell-crank intermediate of said links'and armature whereby when said electromagnet is energized said links will be operated to retract said pivoted keeper, and an electrical indicator cooperating with one of said links to produce an indication at a distance that said keeper has been retracted.

This specification signed and witnessed this 5th day of February, 1904.

FRANK STAEHLE.

Witnesses:

FREDK. O. FIsoHER, LOUIS M. SANDERS. 

